Carabiner

A metal clip with a spring gate.

How to sign

Use Dominant curved-C: hook; thumb or index operates the gate. The base or passive hand is Established rope locus; no separate passive hand required. Form a curved-C hook with the gate closed beside the rope. Open the gate once, attach the hook to the rope locus, then close the gate once. Hold the closed clip attached to the rope. Make a curved-C hook. With the thumb or index, open and close the gate once, then attach it to the R-hand rope locus.